LTC1531CSW datasheet(3/16 Pages) LINER

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LTC1531

ELECTRICAL CHARACTERISTICS

SYMBOL

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

VIH

SHDN Input High Voltage

VCC = 4.5V

2.4

VIL

SHDN Input Low Voltage

VCC = 5.5V

0.8

VOH

DATA, VALID, ZCDATA Output High Voltage

VCC = 4.5V, IO = – 400µA

3.0

4.3

VOL

DATA, VALID, ZCDATA Output Low Voltage

VCC = 4.5V, IO = 1.6mA

0.2

0.4

IINL, IINH

SHDN Low or High Level Input Current

VIN = 5V, 0V

±1

µA

dV/dt

Continuous dV/dt Rejection

(Note 8)

µs

CISO

2pF

Note 4: The sample rate, fSAMPLE, varies with loading on VPW and VREG.

Note 5: Load on CMPOUT pulls current from VREG when CMPOUT is high.

Note 6: Value derived from 1 second test.

Note 7: Zero-cross hysteresis is the minimum amount of signal amplitude

above or below 0V differential to retrigger the zero-cross comparator.

Note 8: Parameter not tested but guaranteed by design.

TYPICAL PERFORMANCE CHARACTERISTICS

TIME (ms)

2.5

3.3

1531 F02

VCC = 5V, CVPW = 1µF

IVREG = 100µA, TA = 25°C

NOTE: NONPERIODIC SAMPLES DUE TO DEPENDENCE

ON VPW > 3.3V AND THE POWER-LISTEN CYCLE

SAMPLING

Note 1: Absolute Maximum Ratings are those values beyond which the life

of a device may be impaired.

Note 2: The sample rate is not continuous, but depends on VPW charging

rate. See Applications Information.

Note 3: See Applications Information for further description of the

comparator switched-capacitor input circuit.

Figure 2. VREG and VPW vs Time

(IVREG = 100µA)

Figure 1. VPW Power-Up and

VREG Samples vs Time

The q denotes specifications which apply over the full operating temperature range, otherwise specifications are TA = 25°C, VCC = 5V.

TIME (ms)

3.3

2.5

1531 F01

100

200

300

NOTES: VRIPPLE DEPENDS ON CVPW AND IVPW + IVREG

tSAMPLE DEPENDS ON IVPW + IVREG

tSAMPLE

VREG

VPW

VCC = 5V

CVPW = 1µF

IVREG = 5mA

TA = 25°C

VRIPPLE

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